Airtac SAID40 Double Rod Cylinder SAID40BX240S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX240S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX240S
The AirTAC SAID40X240-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 240mm stroke. Because a stainless steel SUS304 rod exits both ends, the annular piston area is identical on extend and retract, yielding a perfectly symmetric 528N of force in each direction at 0.5MPa. The integrated magnet allows position tracking using CMSE reed or DMSE solid-state sensors.
This through-rod architecture lets you mount the primary workpiece on one end and attach a cam, secondary tool, or limit flag to the rear. The extruded aluminum barrel includes sensor grooves on both sides, and the adjustable air cushions at both ends absorb end-of-stroke impact. Note that the extending rear rod requires additional clearance in your machine layout.
Airtac SAID40 Double Rod Cylinder SAID40BX240S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX240S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40BX240S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID40 Double Rod Cylinder SAID40BX240S Is Used
Symmetric Force Transfer
Drives shuttle mechanisms where the 528N push and pull forces must be perfectly matched, ensuring consistent cycle times in both directions.
Anti-Rotation Slides
Utilizes the twin SUS304 rods exiting both end covers to keep guided loads rigidly locked against rotational torque without external guides.
Dual-Side Tooling Actuation
Mounts the primary workpiece on the front rod and a rear cam or position flag on the opposite end to trigger DMSE sensors behind the cylinder.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX240S the Right Cylinder?
Select this 40mm bore when an application requires equal push and pull forces (528N at 0.5MPa) and dual-side guidance to prevent rotation. If your mechanism needs less force, the 32mm bore offers 345N; if you need more clamping or lifting power, stepping up to the 50mm bore provides 825N. The -S magnet enables precise end-of-stroke detection with CMSE or DMSE switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
At 240mm, this stroke is within the 1200mm standard limit but requires attention to side-load and rod-bearing bending. For long unsupported strokes, always use an external guide rail to prevent premature seal wear. This cylinder is dimensionally interchangeable per ISO 15552, making it a drop-in replacement for other ISO 15552 double-rod cylinders. Remember that the adjustable air cushions only decelerate the piston; they do not hold a load. If air pressure drops, the piston drifts, so use a SAIL or BSAID lock variant if position holding is required.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID40 Double Rod Cylinder SAID40BX240S FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the push and pull forces are equal. It generates 528N in both directions at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa.
Yes. The SAID40X240-S is an extruded aluminum profile cylinder built to the ISO 15552 standard, making its mounting interface dimensionally interchangeable with other ISO 15552 double-rod cylinders.
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